A unidirectional quantum cascade ring laser

doi:10.1063/1.3524200

2010-12-07

PRE

DOI：10.1063/1.3524200

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摘要

En 中文

We report on the design, fabrication, and characterization of a unidirectional quantum cascade ring laser operating at a wavelength of around 3.4 mu m at 200 K. A unidirectional operation is achieved by incorporating an S-shaped crossover waveguide in a manner that it couples light from the counterclockwise direction to the preferred clockwise direction. The ring laser unidirectionality is confirmed by measuring the counterpropagating wave suppression ratio (CWSR) as a function of injection current. At 1.5 times the threshold current, the CWSR is 9 that is 90% of the light is emitted in the favored (clockwise) direction. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3524200]

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期刊

Applied Physics Letters

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3.6

论文数:

10.4W

被引数:

17.8W

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engineering & physical sciences research council (epsrc)

学者数:

709

论文数: 470

被引数: 1

uk research & innovation (ukri)

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2.7W

论文数: 2.3W

被引数: 32

university of glasgow

学者数:

3.5W

论文数: 3.1W

被引数: 37

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